sparsefile: add some Since markers to docs
sparsefile: add some Since markers to docs

surround-io/gstreamer,centricular/gstreamer,centricular/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,Lachann/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,surround-io/gstreamer,mparis/gstreamer,krichter722/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,mparis/gstreamer,krichter722/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,mparis/gstreamer,mparis/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,mparis/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer